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www.ducksters.com/animals/vertebrates.php

Vertebrates are classified by the chordate subphylum vertebrata. Invertebrates are any other animal that is classified outside of that class. Are there a lot of vertebrate species? There are currently around 65,000 known species of vertebrate animals. This sounds like a lot, but vertebrates are only around 3% of all the animals on Earth.

www.biology4kids.com/files/vert_main.html

Vertebrate Basics Vertebrates are the most advanced organisms on Earth. The traits that make all of the animals in this section special are their spinal cords, vertebrae, and notochords.It's all about having a series of nerves along your back (dorsal side). If you are an organism, you can't just have the nerves sitting there.

kids.kiddle.co/Vertebrate

A vertebrate is an animal with a spinal cord surrounded by cartilage or bone. The word comes from vertebrae, the bones that make up spines. Animals that are not vertebrates are called invertebrates. Vertebrates include birds, fish, amphibians, reptiles, and mammals. The parts of the vertebrate skeleton are:

kids.britannica.com/kids/article/vertebrate/400295

A vertebrate is an animal with a backbone. (An invertebrate is an animal without a backbone.) Fishes, amphibians, reptiles, birds, and mammals, including humans, are all vertebrates.. Vertebrates share some basic characteristics. A hollow backbone and the cranium, or skull, protect the spinal cord and brain of most vertebrates.

study.com/academy/lesson/invertebrates-vs-vertebrates-lesson-for-kids.html

Vertebrates have a spine, or backbone, made of multiple disc-shaped bones called vertebrae. There are five classes of vertebrates: amphibians, fishes, reptiles, birds and mammals.

www.dkfindout.com/us/animals-and-nature/invertebrates

Invertebrates are animals without a backbone or internal skeleton. They come in a huge range of shapes and sizes. Tiny mites are so small they can only be seen with a microscope, while the largest invertebrate ever recorded was a giant squid 43 feet (13 meters) long—as long as a large bus.

www.merriam-webster.com/dictionary/vertebrate

Vertebrate definition is - any of a subphylum (Vertebrata) of chordates that comprises animals (such as mammals, birds, reptiles, amphibians, and fishes) typically having a bony or cartilaginous spinal colum which replaces the notochord, a distinct head containing a brain which arises as an enlarged part of the nerve cord, and an internal usually bony skeleton and that includes some primitive ...

www.biology4kids.com/files/invert_main.html

Invertebrates - One of Two Major Animal Groupings There are two basic groups of higher animals. They are vertebrates and invertebrates. While both have advanced through the processes of evolution, there is one fundamental difference. Invertebrates do not have backbones. Both groups are in the Kingdom Animalia, but their bodies are organized differently.